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KLI-8023-D Datasheet(PDF) 7 Page - ON Semiconductor |
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KLI-8023-D Datasheet(HTML) 7 Page - ON Semiconductor |
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7 / 25 page  KLI−8023 www.onsemi.com 7 Saturation Voltage The saturated signal level is the output voltage corresponding to the maximum charge packet the imager can handle. Adding charge above the saturated level results in the excess charge “spilling” over into neighboring photosites or CCD structures. Either the photodiode capacity or the CCD capacity, with the latter being the most typical case, can limit the charge capacity. The saturated signal level is measured by monitoring the dark-to-light transition between the first-out dark reference pixels and the first active pixels while the irradiance is slowly increased. Note that improper settings on either the output gate (OG) or the reset gate ( fR) can have a clipping effect on the output waveform. Smear Smear, also referred to as Photodiode-to-CCD Crosstalk, occurs when photogenerated charge diffuses to an adjacent CCD (such as a transfer register) and is collected, as opposed to being collected in the photodiode where the photon absorption occurred. The result of smear is to increase the background signal within the dark reference pixels and CCD buffer pixels. This increased background signal reduces the achievable dynamic range; hence, a high smear value is undesirable. The further the photodiode array and the CCD are apart, the less the smear. Contributors to increased smear are a short photodiode-to-CCD separation and improper transfer gate clocking levels or timing. Smear is also highly dependent on incident photon wavelength. In the application, an IR cut-off filter (~710 nm) is recommended. |
Similar Part No. - KLI-8023-D |
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Similar Description - KLI-8023-D |
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